Friction-gearing.



G. Hf GHISH`0LM.

FRIGTION GEARING.

APPLICATION FILED PEB.11, 1909.

UNTEB STATES PATENT OFFICE.

GEORGE H. CHISHOLIVI, OF SUTTER CREEK, CALIFGRNIA.

FBICTION-GEARING.

To all whom t may concern:

Be it known that I, Geenen H. CHIsnoLM, a citizen of the United States,residing at Sutter Creek, in the county of Amador, State of California,have invented certain new and useful Improvements in Friction- Gearing;and l do declare the following to be a full, clear, and exactdescription of the same, such as will enable others skilled in the artIto which it appertains to make and use the same, reference being had tothe accompanying drawings, and to the characters of reference markedthereon, which form a part of this application.

rl`his invention relates to improvements in driving gears or vehiclesand particularly motor vehicles of all kinds, the particular mechanismimproved upon being for the transmission of power, the object of theinvention being to produce a friction driving mechanism which will havea true rolling contact between the driving' and driven friction surfacesclear across such surfaces regardless of position, thus overcoming theobjection tothe present much used disk style of friction transmissionmechanism on account of the constant slippage caused by the differentperipheral speeds at point of contact. rlhe greatest use .for mymechanism would be to take the place of the sliding gear transmissionmechanism and other speed changing gearing now used for automobiles.

A further object of the invention is to produce a simple, inexpensiveand easily operated device for the purpose.

These objects l accomplish by means of an aluminum or cast iron conewith a paper faced beveled wheel on each side te bear on said centercone for friction driving, all three of said members being linkedtogether so that when said center cone is moved backward or forward, thesaid wheels will correspondingly move in and out thus maintaining thesame spaced distance with relation to each other, each wheel having alsoa separate operating pedal to bring one to bear upon the said coneregardless of the other for the purpose of giving the forward or reversemovement to the vehicle as desired. The speed of the vehicle is changedby changing the point of Contact of the wheels on the cone, asdescribed. I also em- Specication of Letters Patent.

Application filed February 11, 1909.

Patented Nov. 30, 1209. Serial No. 477,350.

l ploy such necessary structure and relative arrangement of parts aswill more fully appear by a perusal of the following specification andclaims.

In the drawings similar characters of reference indicate correspondingparts in the several views.

Figure 1 is a longitudinal section of my complete mechanism. Fig. 2 is asectional view of a double lever fulcrum mechanism. Fig. 3 is a viewshowing a modified form of bell crank from that shown in F ig. 1.

Referring now more particularly to the characters of reference on thedrawings 1 designates the main driving shaft from the engine, slidablykeyed to which is a hub 2 to which is bolted an aluminum or cast ironcone 3.

4 is the transmission shaft disposed at right angles to the shaft 1 andon which are mounted two wheels 5 having paper fiber faces 6 adapted tocontact with the cone 3 under certain conditions as will appear, thesaid wheels 5 being spaced slightly from the cone 3 when not inoperation.

On the hub 2 is a yoke 7 maintained in position by a screw collar 8,there being links 9 connecting said yoke 7 with levers 10 on a rockingshaft 11 whereby the said shaft 11 can be operated to move the cone 8backward or forward, the wheels 5 being simultaneously moved to maintaintheir same spaced distance from said cone in the following manner Links12 connect the yoke 7 to bell cranks 13, fulcrumed at their centers onan eccentric 13a having eccentric pins 13b mounted in brackets 13C, suchcranks 13 being pivoted onto levers 16, at their outer ends as at 15,said levers 16 being linked at one end to yokes 17 on the wheels 5 bymeans of links 18, such yokes being maintained in position by means ofscrew collars 19. The other ends of the levers 16 are slotted as at 20engageable on the bell cranks 13 with clamping bolts 21 whereby suchlevers 16 may be adjusted to maintain the predetermined relativeposition of the faces 6 with respect to the cone 8 when such faces 6become worn. Keyed to the eccentric pins 13b are cranks 22, one beingconnected with the forward drive pedal by a rod 24E, and the other tothe reverse pedal by a rod 23. Thus as the cone 3 is moved backward bymeans of the yoke 7, the bell cranks 13 moving on their fulcrums 13,cause the levers 16 to drive the wheels 5 inward to the constantrelative position with respect to the cone 3 and when the vehicle is tobe driven forward or reversed, the proper pedal rod 23 or 2a is operatedto cause the cranks 22 to cause the eccentric cranks 13a- 13" to drivethe bell cranks 13 to operate the levers 16 to drive the wheels 5 intodirect contact with the cone 3 for friction driving.

'lo provide against any undue loss of inotion by reason of the wear onlthe paper face 6 provide the mechanism 16-2021 as described above,whereby the play or Inovement of said lever 16 may be adjusted to keepthe surface 6 always at the necessary point of Contact with the cone 3.

lf desired the form of bell crank shown in Fig. 3 may be used. ln thisview the bell crank 13d has a slot 13e in each end to work over pins onthe yokes 7 and 17 to replace the links 12 and 18.

From the foregoing` description it will be readily seen that the sametrue rolling contact, clear across contact surfaces is maintainedbetween the cone 3 and wheels 5 no matter at what point on said cone 3the friction contact is made and thus the main object of the inventionas set forth herein is substantially fulfilled.

Having thus described my invention what I claim as new and useful anddesire to secure by Letters atent is 1. A friction gearing comprisingadriving shaft and a driven shaft, a cone slidable on said driving shaft,two cones slidable on said driven shaft, and means movable with saidfirst named cone, whereby when said cone is moved, said second namedcones will both be simultaneously moved toward each other.

2. A friction gearing comprising a driving shaft and a driven shaft, acone movable on said driving shaft, two cones movable on said drivenshaft spaced on each side of said first named cone, and bell crankslinked to said first named cones and to said second named cones.

3. A friction gearing comprising a driving shaft and a driven shaft, acone movable on said driving shaft two'cones movable on said drivenshaft spaced on each side of said first named cone, bell cranks linkedto said first named cone and to second named cones, and means connectedwith said bell cranks to operate them to move said last named conesindependently of any movement of said first named cone.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE H. CHISHOLM. llitnesses:

H. H. SIEBE, l). V. RAMAZZo'r'r.

